The Wacker Neuson 5100001799 is a genuine OEM Cylinder Head Screw designed for the BTS 630, BTS 635, and BTS 635S series gasoline cut-off saws. As a direct OEM replacement, this fastener is manufactured to the exact specifications required to properly secure the cylinder head on these machines. Wacker Neuson genuine parts are built to match original tolerances, ensuring correct clamping force and a proper seal between the cylinder head and engine block. If you are servicing a BTS 630, BTS 630S, BTS 635, or BTS 635S, part number 5100001799 is the correct replacement screw for this application.
Key Features
- OEM Thread and Torque Specification: — Engineered to the exact thread pitch, shank diameter, and head geometry required for proper cylinder head clamping on Wacker Neuson BTS cut-off saws.
- Direct Bolt-In Replacement: — Installs into the existing cylinder head mounting positions with no rework, machining, or modification to the engine block or head.
- Broad BTS Series Fitment: — Compatible across the BTS 630, BTS 630S, BTS 635, and BTS 635S cut-off saw family, covering a wide range of machine and serial configurations.
- Critical Compression Integrity: — A correctly torqued cylinder head screw maintains the combustion seal that keeps compression consistent, engine power strong, and fuel consumption in check. A stretched, stripped, or missing screw will cause compression loss and rough running.
- Combustion System Safety: — Proper cylinder head fastener integrity prevents hot gas blow-by at the head gasket interface, which is a genuine safety and fire risk on gasoline-powered cut-off saws operating in demanding cutting conditions.
The cylinder head screw is a critical fastener that clamps the cylinder head firmly against the engine block, compressing the head gasket to form an airtight combustion seal. On a two-stroke gasoline cut-off saw like the BTS 630 and BTS 635 series, this seal is essential for maintaining compression pressure, which directly drives cutting power and engine responsiveness. When a cylinder head screw is overtorqued, stripped, or fails through fatigue, compression drops, the engine runs poorly or loses power entirely, and hot combustion gases can escape at the joint — making prompt replacement with the correct OEM fastener the only reliable fix.
Part Details
| Part Number | 5100001799 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Cylinder Head Screw |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| Cut-off saw BTS 635 | BTS 635 | 5000610190, 5000610191 |
| BTS 635S | BTS 635S | 5000610193, 5000610192, 5000610407 |
| Cut-off saw BTS630 | BTS 630 | 5000610186, 5000610187 |
| Floor Saw BTS 630S | BTS 630S | 5000610406 |
| BTS635s | BTS635s | 5100005408 |
| Cut-Off Saws | BTS 635s | 5100005411, 5100005409 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
